ROCK CUTTING TOOL FOR VIBRATORY ROTARY DRILLING Russian patent published in 1996 - IPC

Abstract RU 2053346 C1

FIELD: hole drilling. SUBSTANCE: rock cutting tool for vibratory rotary drilling has body and bits of diamond-hard metal inserts. Hard metal inserts are installed with positive rake. Formed on hard metal base of hard metal inserts are straight recesses radial or parallel to axis of bit in projection on vertical plane. Straight recesses form stiffening ribs. Hard metal inserts have additional above diamond hard metal layer. EFFECT: higher efficiency. 2 cl, 7 dwg

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RU 2 053 346 C1

Authors

Fedorov L.N.

Dates

1996-01-27—Published

1992-03-25—Filed